Robust LiDAR visual inertial odometry for dynamic scenes

The traditional visual inertial simultaneous localisation and mapping (SLAM) system does not fully consider the dynamic objects in the scene, which can reduce the quality of visual feature point matching. In addition, dynamic objects in the scene can cause illumination changes which reduce the performance of the visual front end and loop closure detection of the system. To address this problem, this study combines 3D light detection and ranging (LiDAR), camera, and inertial measurement units (IMUs) in a tightly coupled manner to estimate the pose of mobile robots, thereby proposing a robust LiDAR visual inertial odometry that can effectively filter out dynamic feature points. In addition, a dynamic feature point detection algorithm with attention mechanism is introduced for target detection and optical flow tracking. In experimental analyses on public datasets and real indoor scenes, the proposed method improved the accuracy and robustness of pose estimation in scenes with dynamic objects and varying illumination compared with traditional methods.